Into the deep: A coarse-grained carbonate turbidite valley and canyon in ultra-deep carbonate setting
International audience New high-resolution multibeam mapping images detail the southern part of Exuma Sound (Southeastern Bahamas), and its unchartered transition area to the deep abyssal plain of the Western North Atlantic, bounded by the Bahama Escarpment extending between San Salvador Island and...
Published in: | Marine Geology |
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Main Authors: | , , , , , , , , , , , , , , , , , , , , |
Other Authors: | , , , , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2019
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Subjects: | |
Online Access: | https://ifp.hal.science/hal-02407554 https://doi.org/10.1016/j.margeo.2018.11.003 |
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ftcollegfrance:oai:HAL:hal-02407554v1 |
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openpolar |
institution |
Open Polar |
collection |
Collège de France: HAL |
op_collection_id |
ftcollegfrance |
language |
English |
topic |
[SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
spellingShingle |
[SDU.STU]Sciences of the Universe [physics]/Earth Sciences Mulder, T. Gillet, H. Hanquiez, V. Reijmer, J.J.G. Droxler, A.W. Recouvreur, A. Fabregas, N. Cavailhes, T. Fauquembergue, K. Blank, D.G. Guiastrennec, L. Seibert, C. Bashah, S. Bujan, S. Ducassou, E. Principaud, M. Conesa, G. Le Goff, J. Ragusa, J. Busson, J. Borgomano, J. Into the deep: A coarse-grained carbonate turbidite valley and canyon in ultra-deep carbonate setting |
topic_facet |
[SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
description |
International audience New high-resolution multibeam mapping images detail the southern part of Exuma Sound (Southeastern Bahamas), and its unchartered transition area to the deep abyssal plain of the Western North Atlantic, bounded by the Bahama Escarpment extending between San Salvador Island and Samana Cay. The transition area is locally referred to as Exuma Plateau. The newly established map reveals the detailed and complex morphology of a giant valley draining a long-lived carbonate platform from its upper slope down to the abyssal plain. This giant valley extends parallel to the slope of Long Island, Conception Island, and Rum Cay. It starts with a perched system flowing on top of a lower Cretaceous drowned main carbonate platform. The valley shows low sinuosity and is characterized by several bends and flow constrictions related to the presence of the small relict isolated platforms that kept alive longer than the main platform before drowning and merging tributaries. Turbidite levees on either side of the valley witness the pathway of multiple gravity flows, generated by upper slope over steepening around Exuma Sound through carbonate offbank transport, some of them locally >15°, and resulting slumping. In addition, additional periplatform sediments are transported to the main valley through numerous secondary slope gullies and several kilometre-long tributaries, draining the upper slopes of cays and islands surrounding Exuma Plateau. Some of them form knickpoints indicating surincision of the main Exuma Valley which is consistent with an important lateral supply of the main Exuma Valley. Prior to reaching the abyssal plain, the main valley abruptly evolves into a deep canyon, 5 km in width at its origin and as much as 10 km wide when it meets the abyssal plain, through two major knickpoints named “chutes” with outsized height exceeding several hundred of meters in height. Both chutes are associated with plunge pools, as deep as 200-m. In the deepest pools, the flows generate a hydraulic jump and ... |
author2 |
Environnements et Paléoenvironnements OCéaniques (EPOC) Observatoire aquitain des sciences de l'univers (OASU) Université Sciences et Technologies - Bordeaux 1 (UB)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Sciences et Technologies - Bordeaux 1 (UB)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-École Pratique des Hautes Études (EPHE) Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Centre National de la Recherche Scientifique (CNRS) King Fahd University of Petroleum and Minerals (KFUPM) Rice University Houston Institut de Physique du Globe de Paris (IPGP) Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Université de La Réunion (UR)-Institut de Physique du Globe de Paris (IPG Paris)-Centre National de la Recherche Scientifique (CNRS) Rosenstiel School of Marine and Atmospheric Science (RSMAS) University of Miami Coral Gables Centre Européen de Recherche et d'Enseignement des Géosciences de l'Environnement (CEREGE) Institut de Recherche pour le Développement (IRD)-Institut National de la Recherche Agronomique (INRA)-Aix Marseille Université (AMU)-Collège de France (CdF (institution))-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) Department of Earth and Environmental Sciences Geneva Université de Genève = University of Geneva (UNIGE) IFP Energies nouvelles (IFPEN) |
format |
Article in Journal/Newspaper |
author |
Mulder, T. Gillet, H. Hanquiez, V. Reijmer, J.J.G. Droxler, A.W. Recouvreur, A. Fabregas, N. Cavailhes, T. Fauquembergue, K. Blank, D.G. Guiastrennec, L. Seibert, C. Bashah, S. Bujan, S. Ducassou, E. Principaud, M. Conesa, G. Le Goff, J. Ragusa, J. Busson, J. Borgomano, J. |
author_facet |
Mulder, T. Gillet, H. Hanquiez, V. Reijmer, J.J.G. Droxler, A.W. Recouvreur, A. Fabregas, N. Cavailhes, T. Fauquembergue, K. Blank, D.G. Guiastrennec, L. Seibert, C. Bashah, S. Bujan, S. Ducassou, E. Principaud, M. Conesa, G. Le Goff, J. Ragusa, J. Busson, J. Borgomano, J. |
author_sort |
Mulder, T. |
title |
Into the deep: A coarse-grained carbonate turbidite valley and canyon in ultra-deep carbonate setting |
title_short |
Into the deep: A coarse-grained carbonate turbidite valley and canyon in ultra-deep carbonate setting |
title_full |
Into the deep: A coarse-grained carbonate turbidite valley and canyon in ultra-deep carbonate setting |
title_fullStr |
Into the deep: A coarse-grained carbonate turbidite valley and canyon in ultra-deep carbonate setting |
title_full_unstemmed |
Into the deep: A coarse-grained carbonate turbidite valley and canyon in ultra-deep carbonate setting |
title_sort |
into the deep: a coarse-grained carbonate turbidite valley and canyon in ultra-deep carbonate setting |
publisher |
HAL CCSD |
publishDate |
2019 |
url |
https://ifp.hal.science/hal-02407554 https://doi.org/10.1016/j.margeo.2018.11.003 |
geographic |
Long Island |
geographic_facet |
Long Island |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
ISSN: 0025-3227 Marine Geology https://ifp.hal.science/hal-02407554 Marine Geology, 2019, 407, pp.316-333. ⟨10.1016/j.margeo.2018.11.003⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.margeo.2018.11.003 hal-02407554 https://ifp.hal.science/hal-02407554 doi:10.1016/j.margeo.2018.11.003 |
op_doi |
https://doi.org/10.1016/j.margeo.2018.11.003 |
container_title |
Marine Geology |
container_volume |
407 |
container_start_page |
316 |
op_container_end_page |
333 |
_version_ |
1802647908355407872 |
spelling |
ftcollegfrance:oai:HAL:hal-02407554v1 2024-06-23T07:55:20+00:00 Into the deep: A coarse-grained carbonate turbidite valley and canyon in ultra-deep carbonate setting Mulder, T. Gillet, H. Hanquiez, V. Reijmer, J.J.G. Droxler, A.W. Recouvreur, A. Fabregas, N. Cavailhes, T. Fauquembergue, K. Blank, D.G. Guiastrennec, L. Seibert, C. Bashah, S. Bujan, S. Ducassou, E. Principaud, M. Conesa, G. Le Goff, J. Ragusa, J. Busson, J. Borgomano, J. Environnements et Paléoenvironnements OCéaniques (EPOC) Observatoire aquitain des sciences de l'univers (OASU) Université Sciences et Technologies - Bordeaux 1 (UB)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Sciences et Technologies - Bordeaux 1 (UB)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-École Pratique des Hautes Études (EPHE) Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Centre National de la Recherche Scientifique (CNRS) King Fahd University of Petroleum and Minerals (KFUPM) Rice University Houston Institut de Physique du Globe de Paris (IPGP) Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Université de La Réunion (UR)-Institut de Physique du Globe de Paris (IPG Paris)-Centre National de la Recherche Scientifique (CNRS) Rosenstiel School of Marine and Atmospheric Science (RSMAS) University of Miami Coral Gables Centre Européen de Recherche et d'Enseignement des Géosciences de l'Environnement (CEREGE) Institut de Recherche pour le Développement (IRD)-Institut National de la Recherche Agronomique (INRA)-Aix Marseille Université (AMU)-Collège de France (CdF (institution))-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) Department of Earth and Environmental Sciences Geneva Université de Genève = University of Geneva (UNIGE) IFP Energies nouvelles (IFPEN) 2019-01 https://ifp.hal.science/hal-02407554 https://doi.org/10.1016/j.margeo.2018.11.003 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/j.margeo.2018.11.003 hal-02407554 https://ifp.hal.science/hal-02407554 doi:10.1016/j.margeo.2018.11.003 ISSN: 0025-3227 Marine Geology https://ifp.hal.science/hal-02407554 Marine Geology, 2019, 407, pp.316-333. ⟨10.1016/j.margeo.2018.11.003⟩ [SDU.STU]Sciences of the Universe [physics]/Earth Sciences info:eu-repo/semantics/article Journal articles 2019 ftcollegfrance https://doi.org/10.1016/j.margeo.2018.11.003 2024-06-13T23:39:52Z International audience New high-resolution multibeam mapping images detail the southern part of Exuma Sound (Southeastern Bahamas), and its unchartered transition area to the deep abyssal plain of the Western North Atlantic, bounded by the Bahama Escarpment extending between San Salvador Island and Samana Cay. The transition area is locally referred to as Exuma Plateau. The newly established map reveals the detailed and complex morphology of a giant valley draining a long-lived carbonate platform from its upper slope down to the abyssal plain. This giant valley extends parallel to the slope of Long Island, Conception Island, and Rum Cay. It starts with a perched system flowing on top of a lower Cretaceous drowned main carbonate platform. The valley shows low sinuosity and is characterized by several bends and flow constrictions related to the presence of the small relict isolated platforms that kept alive longer than the main platform before drowning and merging tributaries. Turbidite levees on either side of the valley witness the pathway of multiple gravity flows, generated by upper slope over steepening around Exuma Sound through carbonate offbank transport, some of them locally >15°, and resulting slumping. In addition, additional periplatform sediments are transported to the main valley through numerous secondary slope gullies and several kilometre-long tributaries, draining the upper slopes of cays and islands surrounding Exuma Plateau. Some of them form knickpoints indicating surincision of the main Exuma Valley which is consistent with an important lateral supply of the main Exuma Valley. Prior to reaching the abyssal plain, the main valley abruptly evolves into a deep canyon, 5 km in width at its origin and as much as 10 km wide when it meets the abyssal plain, through two major knickpoints named “chutes” with outsized height exceeding several hundred of meters in height. Both chutes are associated with plunge pools, as deep as 200-m. In the deepest pools, the flows generate a hydraulic jump and ... Article in Journal/Newspaper North Atlantic Collège de France: HAL Long Island Marine Geology 407 316 333 |